/*********************************************************************
 * Copyright (C) 2002 Andrew Khan
 * <p>
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * <p>
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * <p>
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 ***************************************************************************/

package jxl.read.biff;

import jxl.biff.IntegerHelper;
import jxl.biff.RecordData;
import jxl.common.Logger;

/**
 * Contains the cell dimensions of this worksheet
 */
class DimensionRecord extends RecordData {
    /**
     * The logger
     */
    private static Logger logger = Logger.getLogger(DimensionRecord.class);

    /**
     * The number of rows in this sheet
     */
    private int numRows;
    /**
     * The number of columns in this worksheet
     */
    private int numCols;

    /**
     * Dummy indicators for overloading the constructor
     */
    private static class Biff7 {
    }

    ;
    public static Biff7 biff7 = new Biff7();

    /**
     * Constructs the dimensions from the raw data
     *
     * @param t the raw data
     */
    public DimensionRecord(Record t) {
        super(t);
        byte[] data = t.getData();

        // Sometimes, if the spreadsheet is being generated by dodgy VB modules,
        // even though the excel format is biff8, the dimension record is
        // generated in the old biff 7 format.  This horrible if construct
        // handles that eventuality
        if (data.length == 10) {
            read10ByteData(data);
        } else {
            read14ByteData(data);
        }
    }

    /**
     * Constructs the dimensions from the raw data
     *
     * @param t the raw data
     * @param biff7 an indicator to initialise this record for biff 7 format
     */
    public DimensionRecord(Record t, Biff7 biff7) {
        super(t);
        byte[] data = t.getData();
        read10ByteData(data);
    }

    /**
     * Reads in the data for data records of length 10
     * @param data the data to read
     */
    private void read10ByteData(byte[] data) {
        numRows = IntegerHelper.getInt(data[2], data[3]);
        numCols = IntegerHelper.getInt(data[6], data[7]);
    }

    /**
     * Reads in the data for data records of length 14
     * @param data the data to read
     */
    private void read14ByteData(byte[] data) {
        numRows = IntegerHelper.getInt(data[4], data[5], data[6], data[7]);
        numCols = IntegerHelper.getInt(data[10], data[11]);
    }

    /**
     * Accessor for the number of rows in this sheet
     *
     * @return the number of rows
     */
    public int getNumberOfRows() {
        return numRows;
    }

    /**
     * Accessor for the number of columns in this sheet
     *
     * @return the number of columns
     */
    public int getNumberOfColumns() {
        return numCols;
    }
}







